Tag: RomanNumeral
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Create a class called IllegalRomanNumeralException that extends IllegalArgumentException as shown in lecture.
Programming Use a GUI to open the file for displaying the Roman numerals Modify your RomanNumeralGUI so that it will be a complete JFrame with a menu bar and menus. There should be two menus: one called File and another called Convert. The File menu should have the menu items Open and Quit. The Convert…